I need borders around the text and menu blocks

Hello,

First of all kudos to this developer. I love this theme. Thank you!

However I would like to have elegant and simple shades borders around my text and menu blocks. How can I achieve this? Please explain in simple terms. I do not know anything on CSS.

Here is an image of the shaded border that I am talking about:

http://img170.imageshack.us/my.php?image=bordermc7.jpg

Thank you very much.

xerxes